Add support for Python 3 in Android and iOS (game-ci#152)

* Add support of python 2 command in android and ios

* change comment from `python 2` to `python 3`

Co-authored-by: Webber Takken <[email protected]>

Allow to install multiple modules in the editor image (game-ci#116)

* editor: show output from unity-hub when installing unity and its modules

* fetching Unity takes very long, better show the progress during the fetch

* editor: simplify Extra steps a bit

* remove unnecessary [ call and ``

* editor: allow to install multiple modules

* useful to reuse the same docker image for e.g. linux+windows+android
  platform builds

* editor: allow other users to run sdkmanager

* it has 744 after unzip:
  -rwxr--r-- 1 root root 6.0K Apr 24 23:13 /opt/unity/Editor/Data/PlaybackEngines/AndroidPlayer/SDK/tools/bin/sdkmanager

* fixes Unity failing to use it under different UID

18:59:44  Win32Exception: ApplicationName='/opt/unity/Editor/Data/PlaybackEngines/AndroidPlayer/SDK/tools/bin/sdkmanager', CommandLine='--list', CurrentDirectory='/mnt', Native error= mono-io-layer-error (5)
18:59:44    at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x002dc] in <aa976c2104104b7ca9e1785715722c9d>:0
18:59:44    at System.Diagnostics.Process.Start () [0x0003a] in <aa976c2104104b7ca9e1785715722c9d>:0
18:59:44    at (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
18:59:44    at UnityEditor.Utils.Program.Start (System.EventHandler exitCallback) [0x0006d] in /home/bokken/buildslave/unity/build/Editor/Mono/Utils/Program.cs:48
18:59:44    at UnityEditor.Utils.Program.Start () [0x00001] in /home/bokken/buildslave/unity/build/Editor/Mono/Utils/Program.cs:32
18:59:44    at UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) [0x00026] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.AndroidSDKTools.RunAndroidSdkTool (System.String toolName, System.String arguments, System.Boolean updateCommand, System.String errorMsg, System.String toolsDir, System.String[] warningsToIgnore) [0x0007b] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.AndroidSDKTools.ListComponentsVersions () [0x00062] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.SDKManager.UpdatePackagesList () [0x00079] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.SDKManager.HighestVersionInstalled (UnityEditor.Android.SDKManager+Component tool) [0x00001] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKToolsDetector.GetVersion () [0x00006] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector.Detect (System.Version minVersion, UnityEditor.Android.PostProcessor.ProgressHandler onProgress) [0x0002b] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (System.Version minVersion, UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector detector) [0x00007] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) [0x00177] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) [0x00078] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.PostProcessAndroidPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) [0x00084] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.Android.AndroidBuildPostprocessor.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) [0x00001] in <2c6e9a95f1dd4e06ad71afcd2684dcb7>:0
18:59:44    at UnityEditor.PostprocessBuildPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target) [0x00015] in /home/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:146
18:59:44  UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions, String[], Boolean)
18:59:44  UnityEditor.BuildPipeline:BuildPlayerInternal(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions, String[]) (at /home/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:422)
18:59:44  UnityEditor.BuildPipeline:BuildPlayer(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions, String[]) (at /home/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:321)
18:59:44  UnityEditor.BuildPipeline:BuildPlayer(BuildPlayerOptions) (at /home/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:295)
18:59:44
18:59:44  Error building Player: Win32Exception: ApplicationName='/opt/unity/Editor/Data/PlaybackEngines/AndroidPlayer/SDK/tools/bin/sdkmanager', CommandLine='--list', CurrentDirectory='/mnt', Native error= mono-io-layer-error (5)

* DEVELOPMENT.md: use the repository root as context

* otherwise building base won't find asound.conf:

  Step 7/9 : ADD config/asound.conf /etc/
  ADD failed: file not found in build context or excluded by .dockerignore: stat config/asound.conf: file does not exist

* editor: allow to prepend environment changes through /usr/bin/unity-editor.d/*.sh

* editor: source existing /usr/bin/unity-editor.d/android-* files from .bashrc

* instead of duplicating the same exports as what unity-editor.d is using
* also append to it instead of overwritting it in case some other module
  will need to source something else in future (currently it's only used
  by 2 different versions of android module - only one of these sections
  will be executed

* editor: empty the default ~/.bashrc file

Lets see if it fixes unityci CI step "Validate Android Utils".

* editor: create /usr/bin/unity-editor inside Dockerfile instead of separate file

* base: create /etc/asound.conf inside Dockerfile instead of separate file

editor: fix typo (game-ci#119)

* I guess the author meant chmod here

Partial fixes for no-graphics flag (game-ci#115)

fix: add extra dependencies for 2021.x-linux-il2cpp (lld) (game-ci#104)

Co-authored-by: mob-sakai <[email protected]>

Extend libssl,unwind,notify to full 2019 range (game-ci#93)

Fix build process for 2018.2 and below (game-ci#87)

Tested locally, merging

Bump actions/cache from v2 to v2.1.4 (game-ci#73)

Bumps [actions/cache](https://github.com/actions/cache) from v2 to v2.1.4.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2...26968a0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Set locale to C.UTF-8 in Dockerfile (game-ci#58)

Install Git LFS (game-ci#47)

* Install Git LFS

* Moved git lfs install before apt-get clean